GATE Metallurgical Engineering Online Mock Test

GATE Metallurgical Engineering Online Mock Test Online Free. This mock test having 25 questions in each subjects, with four choices. On each click on answers system will tell you where the answers is correct or incorrect. You can view this GATE MT test question details at the end of the quiz.

GATE 2017 : Metallurgical Engineering (MT) questions answers are applicable for any kind of Metallurgical Engineering Entrance preparation or PSU Competitive Exam in India. You can practice as much as you can to gather knowledge of how to answers GATE MT Exam 2017 critical type papers in short time and this can be a big factor for cracking all India engineering entrance level exam.

GATE Metallurgical Engineering Online Mock Test

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Question 1

As the concentration of point defects in a crystal increases, its configurational entropy

A

does not change

B

decreases

C

increases

D

initially increases and then decreases

Question 2

Critical value of the Gibbs energy of nucleation at equilibrium temperature is

A

zero

B

infinite

C

positive

D

negative

Question 3

With respect to the matrix of Al-Cu alloys, G-P zones are

A

coherent

B

incoherent

C

semi-coherent

D

chemically indistinguishable

Question 4

Which one of the following techniques does NOT require quenching to obtain final case hardness?

A

Flame hardening

B

Induction hardening

C

Nitriding

D

Carburizing

Question 5

Which one of the following elements is an austenite stabilizer?

A

Nitrogen

B

Molybdenum

C

Vanadium

D

Tungsten

Question 6

A 0.2 wt.% plain carbon steel sheet is heated and equilibrated in the inter-critical region followed by instant water quenching. The microstructure of the quenched steel sheet consists of

A

fully martensite

B

proeutectoid ferrite + martensite

C

martensite + pearlite

D

martensite + austenite

Question 7

As compared to the engineering stress-engineering strain curve, the true stress-true strain curve for a given material

A

lies above and to the left

B

lies below and to the right

C

crosses the engineering stress-engineering strain curve

D

is identical

Question 8

Which one of the following does NOT improve fatigue life of a steel component?

A

Nitriding

B

Decarburization

C

Improving surface finish

D

Shot-peening

Question 9

Which one of the following can give information about the corrosion rate?

A

Pourbaix diagram

B

Polarization technique

C

EMF series

D

Galvanic series

Question 10

In a roasting process, the set of conditions that favour sulphate formation from metal sulphide concentrates areP. high temperatureQ. high partial pressure of oxygenR. use of excess airS. high partial pressure of SO3

A

P, R and S

B

P, Q and R

C

Q and S

D

R and S

Question 11

High top pressure in a blast furnace operation

A

favours the solution-loss reaction

B

suppresses the solution-loss reaction

C

decreases gas-solid contact time

D

increases coke rate

Question 12

In L-D steelmaking, the final slag can be best described as

A

oxidizing

B

basic

C

oxidizing and basic

D

reducing and basic

Question 13

The permeability of burden in an ironmaking blast furnace can be improved by using

A

fine charge

B

agglomerated charge

C

oxygen enriched air blast

D

pulverized coal injection through the tuyeres

Question 14

For a good quality brazing, the molten filler alloy should have

A

low contact angle with the base metal

B

low density

C

high surface tension

D

high viscosity

Question 15

Risers are NOT required for casting

A

stainless steel

B

plain carbon steel

C

grey cast iron

D

white cast iron

Question 16

A unit cell of an element has maximum linear density along the [110] direction. The packing density of its (100) plane is

A

0.68

B

0.74

C

0.79

D

0.91

Question 17

For an FCC metal, the ratio of interplanar spacing obtained from the first two peaks of the X-ray diffraction pattern is

A

1.91

B

1.63

C

1.41

D

1.15

Question 18

There are 150 gearwheels in a box, out of which 112 are within the required tolerance, 21 are below and rest are above the required tolerance. If the selection is done without replacement, the combined probability of randomly selecting a gearwheel below the tolerance and then a second one above the tolerance is

A

0.016

B

0.032

C

0.492

D

0.984

Question 19

The yield strength of a polycrystalline metal increases from 100 MPa to 145 MPa on decreasing the grain size from 64 μm to 25 μm. The yield strength of this metal (in MPa) having a grain size of 36μm is

A

110

B

125

C

140

D

165

Question 20

In a brittle material, the maximum internal crack length is 8 μm. If Young’s modulus is 400 GPa and surface energy is 3.14 J/m2, the estimated theoretical fracture strength (in MPa) is

A

375

B

412

C

327

D

447

Question 21

A 480 mm thick slab is hot-rolled using a roll of 720 mm diameter. For a coefficient of friction of0.5, the maximum possible reduction (in mm) is

A

90

B

180

C

240

D

360

Question 22

Determine the correctness or otherwise of the following Assertion (a) and Reason (r).Assertion: For the extraction of metal values from their sulphide concentrates by hydrometallurgical route, leaching with oxygen under high pressure is used.Reason: Presence of oxygen under high pressure causes roasting of sulphides, which helps in leaching of the values.

A

a is true but r is false

B

a is false but r is true

C

both a and r are true, and r is the reason for a

D

both a and r are true, but r is not the reason for a

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GATE MT Online Question Answers Test

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Question 1

In a production facility. iron rods are made with a mean diameter of 6 cm and standard deviation of 0.02 cm. If a large number of rods are tested. the approximate percentage of rods whose sizes fall in the range of 5.98 cm to 6.02 cm is

A

68

B

75

C

90

D

99.7

Question 2

Which one of the following methods is NOT used for numerical integration?

A

Rectangular rule

B

Trapezoidal rule

C

Simpson’s rule

D

Cramer’s rule

Question 3

When a zinc metal rod is immersed in dilute hydrochloric acid. it results in

A

Evolution of hydrogen

B

Evolution of chlorine

C

Evolution of oxygen

D

No evolution of any gas

Question 4

A fluid is flowing with a velocity of 0.5 rn/s on a plate moving with a velocity of 0.01 mJs in the same direction. The velocity at the interface of the fluid and plate is

A

0.0 m/s

B

0.01 m/s

C

0.255 m/s

D

0.50 m/s

Question 5

Hot metal at 1700 K is poured in a sand mould that is open at the top. Heat loss from the liquid metal takes place by

A

Radiation only

B

Radiation and conduction only

C

Radiation and convection only

D

Radiation, conduction and convection

Question 6

Which one of the following is an equilibrium defect?

A

Vacancies

B

Dislocations

C

Stacking faults

D

Grain boundaries

Question 7

Floatation beneficiation is based on the principle of

A

Mineral surface hydrophobicity

B

Gravity difference

C

Chemical reactivity

D

Particle size difference

Question 8

Copper can be reduced from acidic copper sulphate solution by

A

Silver

B

Iron

C

Carbon

D

Lead

Question 9

Which one is NOT an agglomeration process?

A

Noduli7ing

B

Briquettin

C

Roasting

D

Pelletizing

Question 10

During LD blow in steelmaking the impurity that gets removed first is

A

Carbon

B

Phosphorous

C

Manganese

D

Silicon

Question 11

During the solidification of a pure metal. it was found that dendrites are formed. Assuming that the liquid—solid interface is at the melting temperature. the temperature from the interface into the liquid

A

Decreases

B

Increases

C

Remains constant

D

Increases and then decreases

Question 12

A peak in the X-ray diffraction pattern is observed at 20 = 78°. corresponding to {3 11 } planes of an fcc metal. when the incident beam has a wavelength of 0.1 4 mu. The lattice parameter of the metal is approximately

A

0.6 mm

B

0.4 mm

C

0.3 mm

D

0.2 mm

Question 13

At equilibrium spacing in a crystalline solid, which of the following is true for net inter-atomic force (F) and potential energy (U)

A

F is zero and U is zero

B

F is zero and U is minimum

C

F is minimum and U is zero

D

F is minimum and U is minimum

Question 14

The property of a material that CANNOT be significantly changed by heat treatment is
(A) (B)Ans : D

A

Yield strength

B

Ultimate tensile strength

C

Ductility

D

Elastic modulus

Question 15

Which of the following is NOT a fusion welding process?

A

Arc welding

B

Gas welding

C

Resistance welding

D

Friction stir welding

Question 16

Tungsten filament used in electric bulb is processed by

A

Extrusion

B

Wire drawing

C

Casting

D

Powder metallurgy

E

All of these

Question 17

The riser is desi2ned such that the melt in the riser solidifies

A

Before casting solidifies

B

At the same time as casting solidifies

C

After casting solidifies

D

Irrespective of the solidification of the casting

Question 18

Radiography technique of detecting defects is based n the principle of

A

Diffraction

B

Reflection

C

Interference

D

Absorption

Question 19

Identify the correct combination of the following statementsP. Hydrogen electrode is a standard used to measure redox potentials Q. Activation polarization refers to electrochemical processes controlled by reaction sequence at metal-solution interface
R. Potential-pH diagrams can be used to predict corrosion rates of metals
S. Cathodic protection can use sacrificial anodes such as magnesium

A

P. Q and R

B

Q. R and S

C

P. Q and S

D

P. R and S

Question 20

Consider a reaction with activation energy of 8.314 kJ/mol that takes place at 300 K. If the reaction rate is to be tripled, the temperature of the reaction should be

A

174.5 K

B

447.5 K

C

600.5K

D

847.5 K

Question 21

Identify the correct combination of the following statements
P. Bessemer converter can be used in copper smelting
Q. The Mond process for nickel involves reaction of metal with H2 gas
R. Roasted ZnS concentrates can be smelted in a blast furnace
S. Magnesium metal can be produced by electrolysis of sea water

A

P. R and S

B

P. Q and R

C

P and Q

D

Q and S

Question 22

Arrange the following in tenns of increasing severity of quench
P. Oil quenching
Q. Water quenching
R. Water quenching with agitation
S. Brine quenching

A

P

B

Q

C

P

D

Q

Question 23

Regarding recrystallization. which one of the following statements is NOT correct?

A

Higher the amount of cold work. lower is the recrystallization temperature

B

Higher the recovery, higher is the recrystallization temperature

C

Higher the temperature of cold work, higher is the recrystallization temperature

D

Finer the initial grain size, higher is the recrystallization temperature

Question 24

Determine the correctness or otherwise of the followin2 Assertion (a) and Reason (r). Assertion : During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.
Reason : Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.

A

a is false but r is true

B

a is true and r is also true. but r is not the reason for a

C

a is true and r is also true, and r is the reason for a

D

a is true but r is false

Question 25

The force exerted on the steel ball is

A

S.32N

B

6.70N

C

l.67N

D

0.52N

Question 26

Which one of the following options is the closest in meaning to the word given below? Latitude

A

Elibility

B

Freedom

C

Coercion

D

Meticulousness

Question 27

Choose the most appropriate word from the options given below to complete the following sentence:
Given the seriousness of the situation that lie had to face, his —— was impressive.

A

beggary

B

nomenclature

C

jealousy

D

nonchalance

Question 28

Choose the most appropriate alternative from the options given below to complete the following sentence:
If the tired soldier wanted to lie down he the mattress out on the balcony.

A

should take

B

shall take

C

should have taken

D

will have taken

Question 29

One of the parts (A. B. C. D) in the sentence given below contains an ERROR. Which one of the following is INCORRECT? I requested that lie should be given the driving test today instead of tomorrow.

A

requested that

B

should be given

C

the drivin2 test

D

instead of tomorrow

Question 30

There are eight bags of rice looking alike, seven of which have equal weight and one is slightly heavier. The weighing balance is of unlimited capacity. Using this balance. the minimum number of weighings required to identify the heavier bag is

A

2

B

3

C

5

D

8

Question 31

Raju has 14 currency notes in his pocket consisting of only Rs. 20 notes and Rs. 10 notes. The total money value of the notes is Rs. 230. The number of Ps. 10 notes that Raju has is

A

5

B

6

C

9

D

10

Question 32

A and B are friends. They decide to meet between 1 PM and 2 PM on a given day. There is a condition that whoever arrives first will not wait for the other for more than 15 minutes. The probability that they will meet on that day is

A

1/4

B

1/16

C

7/16

D

9/16

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